DATESBETWEEN / DATESINPERIOD - How to make dynamic for a predictive calcuation

[Anonymous]

My task is to create a visual to show a predicted Stock level for a warehouse for the next N days. The N is decided by planned delivery dates, it could be three days in the future or thirty.  Let me over-simplify the data to explain my problem:

I have two tables for current stock level: Warehouse.Level;

And planned deliveries: Delivery.DeliveryID, Delivery.Quantity, Delivery.DeliveryDate.

I want to write a measure that predicts the changing stock level over the coming days. For each row I need to start with my current Warehouse Level and then add all the delivery quantities from the earliest date to each day in the table. The reference point is always the current Warehouse.Level which we can say is 100, Example:

Date	Warehouse Level	Planned Deliveries	Predicted Warehouse Level
01.02.2022	100	50	150
02.02.2022		25	175
03.02.2022		75	250

The output I need is:

Date	Prediction
01.02.2022	150
02.02.2022	175
03.02.2022	250

To get the prediction over the coming days, I decided to use the DATESBETWEEN function but this is where I fail!

MyMeasure = CALCULATE(  SUM(Warehouse[Level]) + SUM(Delivery[Quantity]),

DATESBETWEEN(Delivery[DeliveryDate], TODAY(), The_date_of_the_row  )   )

Now the problem is that third expression in DATESBETWEEN because it needs to be the row date, which is dynamic and I cannot figure out how to get it in the statement! Same issue with DATESINPERIOD.  Any idea? 

[amitchandak · Accepted solution]

@Anonymous , datesbetween and dateinperiod will require date table

MyMeasure = SUM(Warehouse[Level]) + CALCULATE( SUM(Delivery[Quantity]),filter(allselected(Delivery), Delivery[Date]<= Max(Delivery[Date])))

Any time you want to date of the row use min or max

example

LTD =
var _max = if(isfiltered('Date'),MAX( 'Date'[Date]) , today())
var _min = Minx(ALLSELECTED('Date'),'Date'[Date])
return
CALCULATE([net] ,DATESBETWEEN('Date'[Date],_min,_max))

Rolling 12 = CALCULATE(sum(Sales[Sales Amount]),DATESINPERIOD('Date'[Date ],MAX(Sales[Sales Date]),-12,MONTH))

[Anonymous]

Thanks Amit, I understand that these functions require a table and that is specified in the first clause. However reading your reply I am to understand that using a MAX(whateverDate) will return the row in focus, kind of liek a pointer going through the list?